Fuel engine valve



May 17,1927. 3,629,322

W. SCHENKER I I FUEL ENGINE VALVE Filed Sept. 18, 1925 INVENTOR A ORNE Patented May 17, 1%27.

u res WALTER SCHENKER, OF WINTERTHUB, SWITZERLAND, ASSIGNOR TO BUSCH-SULZER BBOS.--DIESEL ENGINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

FUEL ENGINE VALVE.

Application filed September 18, 1925 Serial No. 57,256, and in Switzerland December 15, 1924.

The invention is a safety feature for the fuel injection valves of Diesel and other injection type engines, particularly for fuel valves in which the valve proper, its closing spring and its lifter arm are enclosed in the valve housing. Excessive pressure from explosions occurringin such a housing or transmitted to it from the engine combustion space is likely to burst or shatter it, causing injur and the object of this invention is to con ne any such excessive pressure to the lower or inner part of the housing, which is stronger because reinforced bysurrounding structure. i

To this end, the invention consists in the application of a device in the nature of a check valve to the passageway between the inner and outer parts of the valve housing after the general manner indicated in the accompanylng drawing, Which represents an axial section through an ordinary type of fuel valve having the invention applied to it.

The valve shown is intended for the injection and atomization of fuel oil by means of high pressure air and the housing is accordingly supplied with a fuel line connection 1 and an air connection 2, both delivering, as indicated, to the inner part or chamber of the valve housing which chamber communicates withthe spray nozzle when the valve needle 3 is lifted from its seat. The lower end of the valve needle is surrounded by a mixing sleeve 4 to assist in the mixture of the air and oil in transit to the nozzle, but this mixing device, it will be understood, is merely an incident to the use of high pressure air for fuel spraying purposes and with other types of valves may be omitted. The part of the valve housing between the fuel and air connections andthe spray nozzle is shown as water-jacketed, although this also is not essential, and. is

seated in an appropriate opening in the cylinder head 5, being understood to be clamped therein as usual.

The valve needle 3 extends from the innerpart of the valve housing into the upper or outer part wherein it is provided with a collar (3 and subject to the closing pressure of a spring thrusting against the collar. The lifter arm 7 engages the underside of thecollar to open the valve in the usual way and the lifter shaft 8 will be understood to be provided with a suitable packing where it enters the housing; this does not appear in the drawing. Midway between the outer and inner parts, the interior space of the valve housing is divided by means of a twopart box-form bushing, the parts of which, marked 9 and 10 respectively, are threaded together and to the valve housing, being'introduced into position through the outer open end ofthe housing before the cap 11 has been clamped in place. The valve needle reciprocates within this bushing and inside the bushing it is provided with a short the outer part of the housing. It will be ap-.

parent that the same effect can be produced by other instrumentalities having the same mode of operationas the annual member or sleeve just referred to, but the structure shown is very simple and efficient and is preferred on that account.

The following is claimed:

1. An injection valve for injection type engines comprising a housing containing the movable valve member and a check valve between the inner and outer parts of said housing adapted to prevent transmission of dangerous pressure from the former to the latter.

"2. An injection valve for injection typo engines comprising a housing forthc lllO\'- able valve member, which housing encloses the valve closing spring and lifter arm in its outer part and has a fuel line connection to its inner part, and means for preventing transmission of dangerous pressure from the.

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said housing and a check valve in said bushing adapted to prevent transmission ofdangerous pressure from the inner to the outer part of the housing.

4. An injection valve for injection type engines, comprising a housing, a valve member therein, means for producing a restricted passage between the inner and outer parts of said housing and a sleeve on the valve member for closing said passage.

In testimony whereof, I have signed this specification.

WALTER SCHENKER. 

